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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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4 | |
5 | <!-- | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2012 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | --> | |
23 | ||
21ac6ff1 | 24 | <refentry id="timedatectl" conditional='ENABLE_TIMEDATED' |
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25 | xmlns:xi="http://www.w3.org/2001/XInclude"> |
26 | ||
27 | <refentryinfo> | |
28 | <title>timedatectl</title> | |
29 | <productname>systemd</productname> | |
30 | ||
31 | <authorgroup> | |
32 | <author> | |
33 | <contrib>Developer</contrib> | |
34 | <firstname>Lennart</firstname> | |
35 | <surname>Poettering</surname> | |
36 | <email>lennart@poettering.net</email> | |
37 | </author> | |
38 | </authorgroup> | |
39 | </refentryinfo> | |
40 | ||
41 | <refmeta> | |
42 | <refentrytitle>timedatectl</refentrytitle> | |
43 | <manvolnum>1</manvolnum> | |
44 | </refmeta> | |
45 | ||
46 | <refnamediv> | |
47 | <refname>timedatectl</refname> | |
48 | <refpurpose>Control the system time and date</refpurpose> | |
49 | </refnamediv> | |
50 | ||
51 | <refsynopsisdiv> | |
52 | <cmdsynopsis> | |
53 | <command>timedatectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command> | |
54 | </cmdsynopsis> | |
55 | </refsynopsisdiv> | |
56 | ||
57 | <refsect1> | |
58 | <title>Description</title> | |
59 | ||
60 | <para><command>timedatectl</command> may be used to query and | |
61 | change the system clock and its settings.</para> | |
62 | ||
63 | <para>Use | |
64 | <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
65 | to initialize the system time zone for mounted (but not booted) | |
66 | system images.</para> | |
67 | </refsect1> | |
68 | ||
69 | <refsect1> | |
70 | <title>Options</title> | |
71 | ||
72 | <para>The following options are understood:</para> | |
73 | ||
74 | <variablelist> | |
75 | <varlistentry> | |
76 | <term><option>--no-ask-password</option></term> | |
77 | ||
78 | <listitem><para>Do not query the user for authentication for | |
79 | privileged operations.</para></listitem> | |
80 | </varlistentry> | |
81 | ||
82 | <varlistentry> | |
83 | <term><option>--adjust-system-clock</option></term> | |
84 | ||
85 | <listitem><para>If <command>set-local-rtc</command> is invoked | |
86 | and this option is passed, the system clock is synchronized | |
87 | from the RTC again, taking the new setting into account. | |
88 | Otherwise, the RTC is synchronized from the system | |
89 | clock.</para></listitem> | |
90 | </varlistentry> | |
91 | ||
92 | <xi:include href="user-system-options.xml" xpointer="host" /> | |
93 | <xi:include href="user-system-options.xml" xpointer="machine" /> | |
94 | ||
95 | <xi:include href="standard-options.xml" xpointer="help" /> | |
96 | <xi:include href="standard-options.xml" xpointer="version" /> | |
97 | <xi:include href="standard-options.xml" xpointer="no-pager" /> | |
98 | </variablelist> | |
99 | ||
100 | <para>The following commands are understood:</para> | |
101 | ||
102 | <variablelist> | |
103 | <varlistentry> | |
104 | <term><command>status</command></term> | |
105 | ||
ff5921ba | 106 | <listitem><para>Show current settings of the system clock and |
2fc4f5bd | 107 | RTC, including whether network time synchronization is |
b90930c7 | 108 | on. Note that whether network time synchronization is on |
ff5921ba | 109 | simply reflects whether the |
57506e7d | 110 | <filename>systemd-timesyncd.service</filename> unit is |
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111 | enabled. Even if this command shows the status as off a |
112 | different service might still synchronize the clock with the | |
2fc4f5bd | 113 | network.</para></listitem> |
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114 | </varlistentry> |
115 | ||
116 | <varlistentry> | |
117 | <term><command>set-time [TIME]</command></term> | |
118 | ||
119 | <listitem><para>Set the system clock to the specified time. | |
120 | This will also update the RTC time accordingly. The time may | |
121 | be specified in the format "2012-10-30 | |
122 | 18:17:16".</para></listitem> | |
123 | </varlistentry> | |
124 | ||
125 | <varlistentry> | |
126 | <term><command>set-timezone [TIMEZONE]</command></term> | |
127 | ||
128 | <listitem><para>Set the system time zone to the specified | |
129 | value. Available timezones can be listed with | |
130 | <command>list-timezones</command>. If the RTC is configured to | |
131 | be in the local time, this will also update the RTC time. This | |
132 | call will alter the <filename>/etc/localtime</filename> | |
133 | symlink. See | |
134 | <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
135 | for more information.</para></listitem> | |
136 | </varlistentry> | |
137 | ||
138 | <varlistentry> | |
139 | <term><command>list-timezones</command></term> | |
140 | ||
141 | <listitem><para>List available time zones, one per line. | |
142 | Entries from the list can be set as the system timezone with | |
143 | <command>set-timezone</command>.</para></listitem> | |
144 | </varlistentry> | |
145 | ||
146 | <varlistentry> | |
147 | <term><command>set-local-rtc [BOOL]</command></term> | |
148 | ||
149 | <listitem><para>Takes a boolean argument. If | |
150 | <literal>0</literal>, the system is configured to maintain the | |
151 | RTC in universal time. If <literal>1</literal>, it will | |
152 | maintain the RTC in local time instead. Note that maintaining | |
153 | the RTC in the local timezone is not fully supported and will | |
154 | create various problems with time zone changes and daylight | |
155 | saving adjustments. If at all possible, keep the RTC in UTC | |
156 | mode. Note that invoking this will also synchronize the RTC | |
157 | from the system clock, unless | |
158 | <option>--adjust-system-clock</option> is passed (see above). | |
159 | This command will change the 3rd line of | |
160 | <filename>/etc/adjtime</filename>, as documented in | |
161 | <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>. | |
162 | </para></listitem> | |
163 | </varlistentry> | |
164 | ||
165 | <varlistentry> | |
166 | <term><command>set-ntp [BOOL]</command></term> | |
167 | ||
2fc4f5bd | 168 | <listitem><para>Takes a boolean argument. Controls whether |
b90930c7 | 169 | network time synchronization is enabled (if available). This |
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170 | enables or disables the |
171 | <filename>systemd-timesyncd.service</filename> unit. Note that | |
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172 | even if this command turns time synchronization off a |
173 | different system service might still synchronize the clock | |
174 | with the network.</para></listitem> | |
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175 | </varlistentry> |
176 | ||
177 | </variablelist> | |
178 | ||
179 | </refsect1> | |
180 | ||
181 | <refsect1> | |
182 | <title>Exit status</title> | |
183 | ||
184 | <para>On success, 0 is returned, a non-zero failure | |
185 | code otherwise.</para> | |
186 | </refsect1> | |
187 | ||
188 | <xi:include href="less-variables.xml" /> | |
189 | ||
190 | <refsect1> | |
191 | <title>Examples</title> | |
192 | <para>Show current settings: | |
193 | <programlisting>$ timedatectl | |
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194 | Local time: Di 2015-04-07 16:26:56 CEST |
195 | Universal time: Di 2015-04-07 14:26:56 UTC | |
196 | RTC time: Di 2015-04-07 14:26:56 | |
197 | Time zone: Europe/Berlin (CEST, +0200) | |
b90930c7 | 198 | Network time on: yes |
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199 | NTP synchronized: yes |
200 | RTC in local TZ: no</programlisting> | |
798d3a52 | 201 | </para> |
be1015dd | 202 | |
b90930c7 | 203 | <para>Enable network time synchronization: |
798d3a52 | 204 | <programlisting>$ timedatectl set-ntp true |
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205 | ==== AUTHENTICATING FOR org.freedesktop.timedate1.set-ntp === |
206 | Authentication is required to control whether network time synchronization shall be enabled. | |
207 | Authenticating as: user | |
208 | Password: ******** | |
9fccdb0f | 209 | ==== AUTHENTICATION COMPLETE ===</programlisting> |
be1015dd | 210 | |
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211 | <programlisting>$ systemctl status systemd-timesyncd.service |
212 | ● systemd-timesyncd.service - Network Time Synchronization | |
12b42c76 | 213 | Loaded: loaded (/usr/lib/systemd/system/systemd-timesyncd.service; enabled) |
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214 | Active: active (running) since Mo 2015-03-30 14:20:38 CEST; 5s ago |
215 | Docs: man:systemd-timesyncd.service(8) | |
216 | Main PID: 595 (systemd-timesyn) | |
217 | Status: "Using Time Server 216.239.38.15:123 (time4.google.com)." | |
218 | CGroup: /system.slice/systemd-timesyncd.service | |
12b42c76 | 219 | └─595 /usr/lib/systemd/systemd-timesyncd |
9fccdb0f | 220 | ...</programlisting> |
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221 | </para> |
222 | </refsect1> | |
223 | ||
224 | <refsect1> | |
225 | <title>See Also</title> | |
226 | <para> | |
227 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
228 | <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
229 | <citerefentry project='man-pages'><refentrytitle>date</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
230 | <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
231 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
232 | <citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
ff5921ba | 233 | <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
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234 | <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
235 | </para> | |
236 | </refsect1> | |
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237 | |
238 | </refentry> |